[Forums] Error: While Connecting Combobox to an Entity

Hi,

I am connecting an Source Entity with a combo box. Please look at the situation below:

1) When I connect Users entity to combo box using the below method:

It does not show error.

2) But when I connect an Entite created using External Database I get an Error:

3) The error is as below:

Why I got the above error and how can I solve the error?

Regards,

Manthan Shah.